Septal Lines On Chest X Ray | BEST 2026 |

: Longer (2–6 cm), diagonal lines that radiate from the hilum (center) toward the upper lobes. According to research on ResearchGate , these represent thickened septal plates between lung segments.

These lines are a result of the thickening of the interlobular septa due to fluid accumulation or fibrosis. The presence of septal lines on a chest X-ray suggests that there may be an underlying condition affecting the lung interstitium. septal lines on chest x ray

, often associated with heart failure. Kerley A Lines: These are longer (2–6 cm) lines that radiate from the central part of the lung (the hilum) toward the edges. They represent fluid in the deeper lymphatic channels and are less commonly seen than B lines. Kerley C Lines: These are short, fine lines that create a faint, "web-like" or reticular appearance across the lung. Kerley D Lines: Similar to B lines but seen on a lateral (side-view) X-ray in the space behind the breastbone. Why Do They Appear? The presence of septal lines usually points to an underlying medical condition. The most frequent causes include: Congestive Heart Failure (CHF): This is the most common cause. When the heart cannot pump efficiently, pressure builds up in the lung's blood vessels, forcing fluid into the septal spaces. Pulmonary Edema: General fluid accumulation in the lungs, which can also be caused by kidney failure or severe high blood pressure. Lymphatic Obstruction: Conditions like : Longer (2–6 cm), diagonal lines that radiate

: The most common and clinically recognizable type. They appear as short (1–2 cm), thin, horizontal lines at the lung bases, running perpendicular to the pleural surface. They are a classic sign of interstitial pulmonary edema . The presence of septal lines on a chest

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